Heating-furnace.



-A J. BATES.

HEATING FURNACE.

APPLIcAmN men nEc.22.19115.

Patented Juml 4. 1918'.

5 SHEETS-SHEET Z.

A. J. BAES.

MANN@ FUHNACE.

APV'LMJWNJJ Fili@ DEC.

lnfvntml Juin 1. 1918 5 SHEU UNITED s'rrrrns ATENT OFFICE.

ALBERT J. BATES. OF CHICAGO. ILLINOIS. ASSIGNOR TO BATES EXPANDED STEEL TBUSS C0., OF WILMINGTON. DELAWARE, A CORPURATION OF DELAWARE.

HEATING-FURNAOE.

Application tiled December 22. 1915.

To all whom'. it may concern.'

Be it known that I. Anm-:RT J. Barns, a Citizen of the United States, residing at Chicago, in the count)7 of Cook and State of Illinois, have invented certain new and useful Improvements in Heating-Fornoces. of

which the following is a specification.

This invention relates to the art of treating metals and has for its principal object the provision of a method of and apparatus for heating metallic members, whereby the webs thereof may be heated to a suiliciently high temperature for further treatment While the flanges are retained in a relatively cool condition.

A further object of my invention is the rovision of means whereby the members to ie heated are fed successively to the heating means and are subjected to progressively higher temperatures as they are advanced.

Still further objects of in v invention are the provision of a furnace in which the ineinbers to be heated act as a baille for the heating gases so that the greatest efficiency of the furnace is assured and the provision of simple and effective means for successively feeding the members to be heated to and through the furnace.

Other objects and advantages of my invention will be apparent as it is better understood by reference to the following specification when read iii connection with the accompanying drawing illustrating a preferred embodiment. thereof in which- Figure 1 is a transverse vertical` section through the furnace and feeding means;

Fi 9. is a side elevation of a portion of the urnace and feeding means;

Fig. 3 is a plan view, partially in section of the structure illustrated iii Fig. Q;

Fig. 4 is a vertical section on the line 4-1 of F ig` 3;

Fig. 5 is a vertical section on the line 5-5 of Fig. 4, and

Fig.' 6 is a horizontal section portion of the furnace. A

Referring to the drawing, 1 indicates a suitable furnace structure providing a chambei' into which heating gases are projected from a plurality of sources of such gases, suoli forexainple as the burners 2 adapted to consume oil `or gas. Within the chamber in the furnace 1 a skeleton hearth is arranged comprising a Aplurality of transverse supporting rails 3 i e-Lvteiidinggkacross the chamber. An outlet 4 for the gases is pro` through a Specification of Letters Patent.

Patented June 4, 1918.

Serial No. 68.147. i

abutting and resting upon the rails 3 constituting the skeleton hearth. A pluralityr of closures 7 are hung on flexible members 8 adjacent the opening in the wall of the furnace l and are adapted to cooperate with the flanges (i of the members` to be heated as they enter the furnace to close the opening. i The flexible members S pass over pulleys 9 rotatablfvV mounted above the furnace 1 and weights 1) are secured to the ends of the flexible members El tolialanee the weight 0f the closures l so that the lower edgesll of the closures which. as will be seen from an inspection of Fig. 1. are curved upwardly and outwardly. will rest lightly on the flanges ti of the members to be heated.

A support is provided for the members to be heated outside the furnace and substantiallv in the plane of the skeleton hearth gie bars 12?. Mountedin suitable guideivays 14. adjacent both ends of the support for the members to be heated. are slides 15 having vertical faces 1P adapted to coperate with the flanges 6 of the inn'ibers to be heated. The slides 15 have downwardl)7 extending arms 15 provided with rollers 16' which cooperate with the rails 1T secured to the inner faces of the guideivays 14. A hydraulic elvliuder 1T is provided with a piston rod 18 to which the ends of cables 19 and 20 are secured. the cable 19 passing overpulleys 21 and 2'2 and connecting at its opposite end with one of the members 15 and the cable 2O passing over pulleys and 24 and connecting at its opposite end with the other of the members 15. Cables 25 connect With the members 15. pass over pulleys 26 and are provided at their extremities with weights Q7 which normally maintain the members 15 in the. position indicated in full lines in Figs. 1 and 4.

The hydraulic cylinder 17 is supplied` suit-v the rails 3 an enlarged combustion chamber is formed which extends longitudinally through thel furnace and to a point about midway trailsvcrsely thereof. Transverse partition Wallsl 3lV divide the remaining space beneath thc slmhatou hearth and the bottom of tbc furnace if.- so formed as to restrict thc passage of gases into the space beneath the members to be heated so that the members as they enter the chamber are protect/ed from the full heat of the heating gases. As will be readily undrferstood from an inspection of Fig. l of the drawing the members to be heated form a baille in the chamber, the heating gases passing from beneath around the leading member and above the members to the outlet 4. The members to be heated are thus subjected t0 an increasing temperature as they advance. Openings 32 in the und Walls of thc furnace are provided through which the members, when fully heated can be withdrawn endu wise for further trwftmsnf.

The method ol.' heating the Webs of flanged members, as Mnployed by me, conv prises arranging u. plurality of members within the furnace chamber with theirfwebs horizontal and their Ranges abutting and causing the beating gases to pass above and beneath the members, subjecting the members as they are advanced in the furnace to an increasing temperature, all of the lbnembers in the furnace being advanced step y step.

The operation of my furnace and feed ing means in carrying out this method should be apparent without further description of the structure thereof. The members to be heated `.are arranged as indicated in the drawing on the rails 12 and by operating the handle 30 the slides 15 are caused to move in the gnideways 14 to advance the members'ltoward the opening in the side wall of the furnace. As soon as the members have entered the furnace chamber heating gases are admitted and the members are advanced stepx by step until one is in position to be wit drawn through the opening 32. By this time the web 5 of the member will' have been thoroughly heated to the desired temperature but owing to the greater thickness of metal in the flanges 6 and the fact that the Hanges of ad]a cent members abut, the temperature of these portions of the members will be much lower than that of the web. As soon as a member is withdrawn from the furnace. for further treatment another member is placed on the rails 12 and the slides 15 are actuated to advance the members to be heat/ed alon the rails 12 and the rails 3 forming the eleton hearth.

1,aas,oso

It will be readily understood from the foregoing that I have perfected amethod of and apparatus for heatin metallic members in which the members t emselves form a baile for the heating gases and' whereby the webs may be heated to the desired temperature without unduly heating the anges.

It will be obvious that various Vchanges may be made in the form, construction and arrangement of the parts without departing from the spirit and seppe of the invention or sacrificing any of its material advantages, the form hereinbefore described being merely a preferred embodiment thereof.

claim: y

1. A heating furnace comprising an elongated chamber, a skeleton hearth within said chamber for su porting members to be heated, whereby sai members form a baie, means for directin heating gases into said chamber beneath said skeleton hearth, means for partially protecting members it one side of said chamber from the heat of said gases, means above said hearth to allow said gases to leave said chambena support for said members outside said chamber in substantially the plane of vsaid skeleton hearth, and means for simultaneously advancing all of thg members on said support and skeleton hearth.

2. A heating furnace comprising a chamber, means within said chamber to support a plurality of members to be heated whereby the form a continuous baiile extending from t e rear to a point short of the front thereof, means in the front of the chamber to direct the flame toward the rear thereof, and means in said chamber to defleet the dame toward the front along one side of the members being heated, around the forward end thereof, and toward the rear and along the 1other side of the members. g

3,.l A heating furnace comprising a chamber means within said chamber to su port a plurality of members to be heated w ereby they form a continuous baille extending from the rear to a point short of the front thereof, means in the front of the chamber to direct a fiame toward the rear thereof, means in said chamber to deflect the flame toward the front along one side of the members being heated, around the forward end thereof, and toward the rear and along the other side of the members, and meansA at the rear of the chamber for choking the passage of gases rearwardly beneath a por'- tion of the baille formed bv said members.

ALBERT J. BATES.

Witness:

M. A. Kmnm. 

